Netbackup Upgrade from 7.0.1 to 7.5.0.6 - Known Issues

We will be upgrading the existing Netbackup master server in clustered configuration using MSCS on windows 2008 R2 from 7.0.1 to 7.5.0.6. I heard that there are some issues while doing one step upgrade direclty from 7.0.1 to 7.5. If you faced any issues please share with me your experiences.

5. NetBackup 7.5 migrates the NetBackup catalog image header information into the Netbackup relational database. This is a multistep process that may impact installation and operational performance until complete. Please review the following PDF for more details:

Simply, archinving the catalog backs up the .f files and deletes them. They are restored as and when needed. This is done to save space, as the majoity of the space the NBU uses, is due to the '.f' files.